mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-08-23 17:30:02 +00:00
907 lines
24 KiB
C
907 lines
24 KiB
C
/*
|
|
* libata-bmdma.c - helper library for PCI IDE BMDMA
|
|
*
|
|
* Maintained by: Jeff Garzik <jgarzik@pobox.com>
|
|
* Please ALWAYS copy linux-ide@vger.kernel.org
|
|
* on emails.
|
|
*
|
|
* Copyright 2003-2006 Red Hat, Inc. All rights reserved.
|
|
* Copyright 2003-2006 Jeff Garzik
|
|
*
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation; either version 2, or (at your option)
|
|
* any later version.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program; see the file COPYING. If not, write to
|
|
* the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
|
|
*
|
|
*
|
|
* libata documentation is available via 'make {ps|pdf}docs',
|
|
* as Documentation/DocBook/libata.*
|
|
*
|
|
* Hardware documentation available from http://www.t13.org/ and
|
|
* http://www.sata-io.org/
|
|
*
|
|
*/
|
|
|
|
#include <linux/kernel.h>
|
|
#include <linux/pci.h>
|
|
#include <linux/libata.h>
|
|
|
|
#include "libata.h"
|
|
|
|
/**
|
|
* ata_irq_on - Enable interrupts on a port.
|
|
* @ap: Port on which interrupts are enabled.
|
|
*
|
|
* Enable interrupts on a legacy IDE device using MMIO or PIO,
|
|
* wait for idle, clear any pending interrupts.
|
|
*
|
|
* LOCKING:
|
|
* Inherited from caller.
|
|
*/
|
|
u8 ata_irq_on(struct ata_port *ap)
|
|
{
|
|
struct ata_ioports *ioaddr = &ap->ioaddr;
|
|
u8 tmp;
|
|
|
|
ap->ctl &= ~ATA_NIEN;
|
|
ap->last_ctl = ap->ctl;
|
|
|
|
iowrite8(ap->ctl, ioaddr->ctl_addr);
|
|
tmp = ata_wait_idle(ap);
|
|
|
|
ap->ops->irq_clear(ap);
|
|
|
|
return tmp;
|
|
}
|
|
|
|
u8 ata_dummy_irq_on (struct ata_port *ap) { return 0; }
|
|
|
|
/**
|
|
* ata_irq_ack - Acknowledge a device interrupt.
|
|
* @ap: Port on which interrupts are enabled.
|
|
*
|
|
* Wait up to 10 ms for legacy IDE device to become idle (BUSY
|
|
* or BUSY+DRQ clear). Obtain dma status and port status from
|
|
* device. Clear the interrupt. Return port status.
|
|
*
|
|
* LOCKING:
|
|
*/
|
|
|
|
u8 ata_irq_ack(struct ata_port *ap, unsigned int chk_drq)
|
|
{
|
|
unsigned int bits = chk_drq ? ATA_BUSY | ATA_DRQ : ATA_BUSY;
|
|
u8 host_stat, post_stat, status;
|
|
|
|
status = ata_busy_wait(ap, bits, 1000);
|
|
if (status & bits)
|
|
if (ata_msg_err(ap))
|
|
printk(KERN_ERR "abnormal status 0x%X\n", status);
|
|
|
|
/* get controller status; clear intr, err bits */
|
|
host_stat = ioread8(ap->ioaddr.bmdma_addr + ATA_DMA_STATUS);
|
|
iowrite8(host_stat | ATA_DMA_INTR | ATA_DMA_ERR,
|
|
ap->ioaddr.bmdma_addr + ATA_DMA_STATUS);
|
|
|
|
post_stat = ioread8(ap->ioaddr.bmdma_addr + ATA_DMA_STATUS);
|
|
|
|
if (ata_msg_intr(ap))
|
|
printk(KERN_INFO "%s: irq ack: host_stat 0x%X, new host_stat 0x%X, drv_stat 0x%X\n",
|
|
__FUNCTION__,
|
|
host_stat, post_stat, status);
|
|
|
|
return status;
|
|
}
|
|
|
|
u8 ata_dummy_irq_ack(struct ata_port *ap, unsigned int chk_drq) { return 0; }
|
|
|
|
/**
|
|
* ata_tf_load - send taskfile registers to host controller
|
|
* @ap: Port to which output is sent
|
|
* @tf: ATA taskfile register set
|
|
*
|
|
* Outputs ATA taskfile to standard ATA host controller.
|
|
*
|
|
* LOCKING:
|
|
* Inherited from caller.
|
|
*/
|
|
|
|
void ata_tf_load(struct ata_port *ap, const struct ata_taskfile *tf)
|
|
{
|
|
struct ata_ioports *ioaddr = &ap->ioaddr;
|
|
unsigned int is_addr = tf->flags & ATA_TFLAG_ISADDR;
|
|
|
|
if (tf->ctl != ap->last_ctl) {
|
|
iowrite8(tf->ctl, ioaddr->ctl_addr);
|
|
ap->last_ctl = tf->ctl;
|
|
ata_wait_idle(ap);
|
|
}
|
|
|
|
if (is_addr && (tf->flags & ATA_TFLAG_LBA48)) {
|
|
iowrite8(tf->hob_feature, ioaddr->feature_addr);
|
|
iowrite8(tf->hob_nsect, ioaddr->nsect_addr);
|
|
iowrite8(tf->hob_lbal, ioaddr->lbal_addr);
|
|
iowrite8(tf->hob_lbam, ioaddr->lbam_addr);
|
|
iowrite8(tf->hob_lbah, ioaddr->lbah_addr);
|
|
VPRINTK("hob: feat 0x%X nsect 0x%X, lba 0x%X 0x%X 0x%X\n",
|
|
tf->hob_feature,
|
|
tf->hob_nsect,
|
|
tf->hob_lbal,
|
|
tf->hob_lbam,
|
|
tf->hob_lbah);
|
|
}
|
|
|
|
if (is_addr) {
|
|
iowrite8(tf->feature, ioaddr->feature_addr);
|
|
iowrite8(tf->nsect, ioaddr->nsect_addr);
|
|
iowrite8(tf->lbal, ioaddr->lbal_addr);
|
|
iowrite8(tf->lbam, ioaddr->lbam_addr);
|
|
iowrite8(tf->lbah, ioaddr->lbah_addr);
|
|
VPRINTK("feat 0x%X nsect 0x%X lba 0x%X 0x%X 0x%X\n",
|
|
tf->feature,
|
|
tf->nsect,
|
|
tf->lbal,
|
|
tf->lbam,
|
|
tf->lbah);
|
|
}
|
|
|
|
if (tf->flags & ATA_TFLAG_DEVICE) {
|
|
iowrite8(tf->device, ioaddr->device_addr);
|
|
VPRINTK("device 0x%X\n", tf->device);
|
|
}
|
|
|
|
ata_wait_idle(ap);
|
|
}
|
|
|
|
/**
|
|
* ata_exec_command - issue ATA command to host controller
|
|
* @ap: port to which command is being issued
|
|
* @tf: ATA taskfile register set
|
|
*
|
|
* Issues ATA command, with proper synchronization with interrupt
|
|
* handler / other threads.
|
|
*
|
|
* LOCKING:
|
|
* spin_lock_irqsave(host lock)
|
|
*/
|
|
void ata_exec_command(struct ata_port *ap, const struct ata_taskfile *tf)
|
|
{
|
|
DPRINTK("ata%u: cmd 0x%X\n", ap->print_id, tf->command);
|
|
|
|
iowrite8(tf->command, ap->ioaddr.command_addr);
|
|
ata_pause(ap);
|
|
}
|
|
|
|
/**
|
|
* ata_tf_read - input device's ATA taskfile shadow registers
|
|
* @ap: Port from which input is read
|
|
* @tf: ATA taskfile register set for storing input
|
|
*
|
|
* Reads ATA taskfile registers for currently-selected device
|
|
* into @tf.
|
|
*
|
|
* LOCKING:
|
|
* Inherited from caller.
|
|
*/
|
|
void ata_tf_read(struct ata_port *ap, struct ata_taskfile *tf)
|
|
{
|
|
struct ata_ioports *ioaddr = &ap->ioaddr;
|
|
|
|
tf->command = ata_check_status(ap);
|
|
tf->feature = ioread8(ioaddr->error_addr);
|
|
tf->nsect = ioread8(ioaddr->nsect_addr);
|
|
tf->lbal = ioread8(ioaddr->lbal_addr);
|
|
tf->lbam = ioread8(ioaddr->lbam_addr);
|
|
tf->lbah = ioread8(ioaddr->lbah_addr);
|
|
tf->device = ioread8(ioaddr->device_addr);
|
|
|
|
if (tf->flags & ATA_TFLAG_LBA48) {
|
|
iowrite8(tf->ctl | ATA_HOB, ioaddr->ctl_addr);
|
|
tf->hob_feature = ioread8(ioaddr->error_addr);
|
|
tf->hob_nsect = ioread8(ioaddr->nsect_addr);
|
|
tf->hob_lbal = ioread8(ioaddr->lbal_addr);
|
|
tf->hob_lbam = ioread8(ioaddr->lbam_addr);
|
|
tf->hob_lbah = ioread8(ioaddr->lbah_addr);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* ata_check_status - Read device status reg & clear interrupt
|
|
* @ap: port where the device is
|
|
*
|
|
* Reads ATA taskfile status register for currently-selected device
|
|
* and return its value. This also clears pending interrupts
|
|
* from this device
|
|
*
|
|
* LOCKING:
|
|
* Inherited from caller.
|
|
*/
|
|
u8 ata_check_status(struct ata_port *ap)
|
|
{
|
|
return ioread8(ap->ioaddr.status_addr);
|
|
}
|
|
|
|
/**
|
|
* ata_altstatus - Read device alternate status reg
|
|
* @ap: port where the device is
|
|
*
|
|
* Reads ATA taskfile alternate status register for
|
|
* currently-selected device and return its value.
|
|
*
|
|
* Note: may NOT be used as the check_altstatus() entry in
|
|
* ata_port_operations.
|
|
*
|
|
* LOCKING:
|
|
* Inherited from caller.
|
|
*/
|
|
u8 ata_altstatus(struct ata_port *ap)
|
|
{
|
|
if (ap->ops->check_altstatus)
|
|
return ap->ops->check_altstatus(ap);
|
|
|
|
return ioread8(ap->ioaddr.altstatus_addr);
|
|
}
|
|
|
|
/**
|
|
* ata_bmdma_setup - Set up PCI IDE BMDMA transaction
|
|
* @qc: Info associated with this ATA transaction.
|
|
*
|
|
* LOCKING:
|
|
* spin_lock_irqsave(host lock)
|
|
*/
|
|
void ata_bmdma_setup(struct ata_queued_cmd *qc)
|
|
{
|
|
struct ata_port *ap = qc->ap;
|
|
unsigned int rw = (qc->tf.flags & ATA_TFLAG_WRITE);
|
|
u8 dmactl;
|
|
|
|
/* load PRD table addr. */
|
|
mb(); /* make sure PRD table writes are visible to controller */
|
|
iowrite32(ap->prd_dma, ap->ioaddr.bmdma_addr + ATA_DMA_TABLE_OFS);
|
|
|
|
/* specify data direction, triple-check start bit is clear */
|
|
dmactl = ioread8(ap->ioaddr.bmdma_addr + ATA_DMA_CMD);
|
|
dmactl &= ~(ATA_DMA_WR | ATA_DMA_START);
|
|
if (!rw)
|
|
dmactl |= ATA_DMA_WR;
|
|
iowrite8(dmactl, ap->ioaddr.bmdma_addr + ATA_DMA_CMD);
|
|
|
|
/* issue r/w command */
|
|
ap->ops->exec_command(ap, &qc->tf);
|
|
}
|
|
|
|
/**
|
|
* ata_bmdma_start - Start a PCI IDE BMDMA transaction
|
|
* @qc: Info associated with this ATA transaction.
|
|
*
|
|
* LOCKING:
|
|
* spin_lock_irqsave(host lock)
|
|
*/
|
|
void ata_bmdma_start (struct ata_queued_cmd *qc)
|
|
{
|
|
struct ata_port *ap = qc->ap;
|
|
u8 dmactl;
|
|
|
|
/* start host DMA transaction */
|
|
dmactl = ioread8(ap->ioaddr.bmdma_addr + ATA_DMA_CMD);
|
|
iowrite8(dmactl | ATA_DMA_START, ap->ioaddr.bmdma_addr + ATA_DMA_CMD);
|
|
|
|
/* Strictly, one may wish to issue a readb() here, to
|
|
* flush the mmio write. However, control also passes
|
|
* to the hardware at this point, and it will interrupt
|
|
* us when we are to resume control. So, in effect,
|
|
* we don't care when the mmio write flushes.
|
|
* Further, a read of the DMA status register _immediately_
|
|
* following the write may not be what certain flaky hardware
|
|
* is expected, so I think it is best to not add a readb()
|
|
* without first all the MMIO ATA cards/mobos.
|
|
* Or maybe I'm just being paranoid.
|
|
*/
|
|
}
|
|
|
|
/**
|
|
* ata_bmdma_irq_clear - Clear PCI IDE BMDMA interrupt.
|
|
* @ap: Port associated with this ATA transaction.
|
|
*
|
|
* Clear interrupt and error flags in DMA status register.
|
|
*
|
|
* May be used as the irq_clear() entry in ata_port_operations.
|
|
*
|
|
* LOCKING:
|
|
* spin_lock_irqsave(host lock)
|
|
*/
|
|
void ata_bmdma_irq_clear(struct ata_port *ap)
|
|
{
|
|
void __iomem *mmio = ap->ioaddr.bmdma_addr;
|
|
|
|
if (!mmio)
|
|
return;
|
|
|
|
iowrite8(ioread8(mmio + ATA_DMA_STATUS), mmio + ATA_DMA_STATUS);
|
|
}
|
|
|
|
/**
|
|
* ata_bmdma_status - Read PCI IDE BMDMA status
|
|
* @ap: Port associated with this ATA transaction.
|
|
*
|
|
* Read and return BMDMA status register.
|
|
*
|
|
* May be used as the bmdma_status() entry in ata_port_operations.
|
|
*
|
|
* LOCKING:
|
|
* spin_lock_irqsave(host lock)
|
|
*/
|
|
u8 ata_bmdma_status(struct ata_port *ap)
|
|
{
|
|
return ioread8(ap->ioaddr.bmdma_addr + ATA_DMA_STATUS);
|
|
}
|
|
|
|
/**
|
|
* ata_bmdma_stop - Stop PCI IDE BMDMA transfer
|
|
* @qc: Command we are ending DMA for
|
|
*
|
|
* Clears the ATA_DMA_START flag in the dma control register
|
|
*
|
|
* May be used as the bmdma_stop() entry in ata_port_operations.
|
|
*
|
|
* LOCKING:
|
|
* spin_lock_irqsave(host lock)
|
|
*/
|
|
void ata_bmdma_stop(struct ata_queued_cmd *qc)
|
|
{
|
|
struct ata_port *ap = qc->ap;
|
|
void __iomem *mmio = ap->ioaddr.bmdma_addr;
|
|
|
|
/* clear start/stop bit */
|
|
iowrite8(ioread8(mmio + ATA_DMA_CMD) & ~ATA_DMA_START,
|
|
mmio + ATA_DMA_CMD);
|
|
|
|
/* one-PIO-cycle guaranteed wait, per spec, for HDMA1:0 transition */
|
|
ata_altstatus(ap); /* dummy read */
|
|
}
|
|
|
|
/**
|
|
* ata_bmdma_freeze - Freeze BMDMA controller port
|
|
* @ap: port to freeze
|
|
*
|
|
* Freeze BMDMA controller port.
|
|
*
|
|
* LOCKING:
|
|
* Inherited from caller.
|
|
*/
|
|
void ata_bmdma_freeze(struct ata_port *ap)
|
|
{
|
|
struct ata_ioports *ioaddr = &ap->ioaddr;
|
|
|
|
ap->ctl |= ATA_NIEN;
|
|
ap->last_ctl = ap->ctl;
|
|
|
|
iowrite8(ap->ctl, ioaddr->ctl_addr);
|
|
|
|
/* Under certain circumstances, some controllers raise IRQ on
|
|
* ATA_NIEN manipulation. Also, many controllers fail to mask
|
|
* previously pending IRQ on ATA_NIEN assertion. Clear it.
|
|
*/
|
|
ata_chk_status(ap);
|
|
|
|
ap->ops->irq_clear(ap);
|
|
}
|
|
|
|
/**
|
|
* ata_bmdma_thaw - Thaw BMDMA controller port
|
|
* @ap: port to thaw
|
|
*
|
|
* Thaw BMDMA controller port.
|
|
*
|
|
* LOCKING:
|
|
* Inherited from caller.
|
|
*/
|
|
void ata_bmdma_thaw(struct ata_port *ap)
|
|
{
|
|
/* clear & re-enable interrupts */
|
|
ata_chk_status(ap);
|
|
ap->ops->irq_clear(ap);
|
|
ap->ops->irq_on(ap);
|
|
}
|
|
|
|
/**
|
|
* ata_bmdma_drive_eh - Perform EH with given methods for BMDMA controller
|
|
* @ap: port to handle error for
|
|
* @prereset: prereset method (can be NULL)
|
|
* @softreset: softreset method (can be NULL)
|
|
* @hardreset: hardreset method (can be NULL)
|
|
* @postreset: postreset method (can be NULL)
|
|
*
|
|
* Handle error for ATA BMDMA controller. It can handle both
|
|
* PATA and SATA controllers. Many controllers should be able to
|
|
* use this EH as-is or with some added handling before and
|
|
* after.
|
|
*
|
|
* This function is intended to be used for constructing
|
|
* ->error_handler callback by low level drivers.
|
|
*
|
|
* LOCKING:
|
|
* Kernel thread context (may sleep)
|
|
*/
|
|
void ata_bmdma_drive_eh(struct ata_port *ap, ata_prereset_fn_t prereset,
|
|
ata_reset_fn_t softreset, ata_reset_fn_t hardreset,
|
|
ata_postreset_fn_t postreset)
|
|
{
|
|
struct ata_queued_cmd *qc;
|
|
unsigned long flags;
|
|
int thaw = 0;
|
|
|
|
qc = __ata_qc_from_tag(ap, ap->active_tag);
|
|
if (qc && !(qc->flags & ATA_QCFLAG_FAILED))
|
|
qc = NULL;
|
|
|
|
/* reset PIO HSM and stop DMA engine */
|
|
spin_lock_irqsave(ap->lock, flags);
|
|
|
|
ap->hsm_task_state = HSM_ST_IDLE;
|
|
|
|
if (qc && (qc->tf.protocol == ATA_PROT_DMA ||
|
|
qc->tf.protocol == ATA_PROT_ATAPI_DMA)) {
|
|
u8 host_stat;
|
|
|
|
host_stat = ap->ops->bmdma_status(ap);
|
|
|
|
/* BMDMA controllers indicate host bus error by
|
|
* setting DMA_ERR bit and timing out. As it wasn't
|
|
* really a timeout event, adjust error mask and
|
|
* cancel frozen state.
|
|
*/
|
|
if (qc->err_mask == AC_ERR_TIMEOUT && (host_stat & ATA_DMA_ERR)) {
|
|
qc->err_mask = AC_ERR_HOST_BUS;
|
|
thaw = 1;
|
|
}
|
|
|
|
ap->ops->bmdma_stop(qc);
|
|
}
|
|
|
|
ata_altstatus(ap);
|
|
ata_chk_status(ap);
|
|
ap->ops->irq_clear(ap);
|
|
|
|
spin_unlock_irqrestore(ap->lock, flags);
|
|
|
|
if (thaw)
|
|
ata_eh_thaw_port(ap);
|
|
|
|
/* PIO and DMA engines have been stopped, perform recovery */
|
|
ata_do_eh(ap, prereset, softreset, hardreset, postreset);
|
|
}
|
|
|
|
/**
|
|
* ata_bmdma_error_handler - Stock error handler for BMDMA controller
|
|
* @ap: port to handle error for
|
|
*
|
|
* Stock error handler for BMDMA controller.
|
|
*
|
|
* LOCKING:
|
|
* Kernel thread context (may sleep)
|
|
*/
|
|
void ata_bmdma_error_handler(struct ata_port *ap)
|
|
{
|
|
ata_reset_fn_t hardreset;
|
|
|
|
hardreset = NULL;
|
|
if (sata_scr_valid(ap))
|
|
hardreset = sata_std_hardreset;
|
|
|
|
ata_bmdma_drive_eh(ap, ata_std_prereset, ata_std_softreset, hardreset,
|
|
ata_std_postreset);
|
|
}
|
|
|
|
/**
|
|
* ata_bmdma_post_internal_cmd - Stock post_internal_cmd for
|
|
* BMDMA controller
|
|
* @qc: internal command to clean up
|
|
*
|
|
* LOCKING:
|
|
* Kernel thread context (may sleep)
|
|
*/
|
|
void ata_bmdma_post_internal_cmd(struct ata_queued_cmd *qc)
|
|
{
|
|
if (qc->ap->ioaddr.bmdma_addr)
|
|
ata_bmdma_stop(qc);
|
|
}
|
|
|
|
#ifdef CONFIG_PCI
|
|
|
|
static int ata_resources_present(struct pci_dev *pdev, int port)
|
|
{
|
|
int i;
|
|
|
|
/* Check the PCI resources for this channel are enabled */
|
|
port = port * 2;
|
|
for (i = 0; i < 2; i ++) {
|
|
if (pci_resource_start(pdev, port + i) == 0 ||
|
|
pci_resource_len(pdev, port + i) == 0)
|
|
return 0;
|
|
}
|
|
return 1;
|
|
}
|
|
|
|
/**
|
|
* ata_pci_init_native_mode - Initialize native-mode driver
|
|
* @pdev: pci device to be initialized
|
|
* @port: array[2] of pointers to port info structures.
|
|
* @ports: bitmap of ports present
|
|
*
|
|
* Utility function which allocates and initializes an
|
|
* ata_probe_ent structure for a standard dual-port
|
|
* PIO-based IDE controller. The returned ata_probe_ent
|
|
* structure can be passed to ata_device_add(). The returned
|
|
* ata_probe_ent structure should then be freed with kfree().
|
|
*
|
|
* The caller need only pass the address of the primary port, the
|
|
* secondary will be deduced automatically. If the device has non
|
|
* standard secondary port mappings this function can be called twice,
|
|
* once for each interface.
|
|
*/
|
|
|
|
struct ata_probe_ent *
|
|
ata_pci_init_native_mode(struct pci_dev *pdev, struct ata_port_info **port, int ports)
|
|
{
|
|
struct ata_probe_ent *probe_ent;
|
|
int i, p = 0;
|
|
void __iomem * const *iomap;
|
|
|
|
/* iomap BARs */
|
|
for (i = 0; i < 4; i++) {
|
|
if (pcim_iomap(pdev, i, 0) == NULL) {
|
|
dev_printk(KERN_ERR, &pdev->dev,
|
|
"failed to iomap PCI BAR %d\n", i);
|
|
return NULL;
|
|
}
|
|
}
|
|
|
|
pcim_iomap(pdev, 4, 0); /* may fail */
|
|
iomap = pcim_iomap_table(pdev);
|
|
|
|
/* alloc and init probe_ent */
|
|
probe_ent = ata_probe_ent_alloc(pci_dev_to_dev(pdev), port[0]);
|
|
if (!probe_ent)
|
|
return NULL;
|
|
|
|
probe_ent->irq = pdev->irq;
|
|
probe_ent->irq_flags = IRQF_SHARED;
|
|
|
|
/* Discard disabled ports. Some controllers show their
|
|
unused channels this way */
|
|
if (ata_resources_present(pdev, 0) == 0)
|
|
ports &= ~ATA_PORT_PRIMARY;
|
|
if (ata_resources_present(pdev, 1) == 0)
|
|
ports &= ~ATA_PORT_SECONDARY;
|
|
|
|
if (ports & ATA_PORT_PRIMARY) {
|
|
probe_ent->port[p].cmd_addr = iomap[0];
|
|
probe_ent->port[p].altstatus_addr =
|
|
probe_ent->port[p].ctl_addr = (void __iomem *)
|
|
((unsigned long)iomap[1] | ATA_PCI_CTL_OFS);
|
|
if (iomap[4]) {
|
|
if ((!(port[p]->flags & ATA_FLAG_IGN_SIMPLEX)) &&
|
|
(ioread8(iomap[4] + 2) & 0x80))
|
|
probe_ent->_host_flags |= ATA_HOST_SIMPLEX;
|
|
probe_ent->port[p].bmdma_addr = iomap[4];
|
|
}
|
|
ata_std_ports(&probe_ent->port[p]);
|
|
p++;
|
|
}
|
|
|
|
if (ports & ATA_PORT_SECONDARY) {
|
|
probe_ent->port[p].cmd_addr = iomap[2];
|
|
probe_ent->port[p].altstatus_addr =
|
|
probe_ent->port[p].ctl_addr = (void __iomem *)
|
|
((unsigned long)iomap[3] | ATA_PCI_CTL_OFS);
|
|
if (iomap[4]) {
|
|
if ((!(port[p]->flags & ATA_FLAG_IGN_SIMPLEX)) &&
|
|
(ioread8(iomap[4] + 10) & 0x80))
|
|
probe_ent->_host_flags |= ATA_HOST_SIMPLEX;
|
|
probe_ent->port[p].bmdma_addr = iomap[4] + 8;
|
|
}
|
|
ata_std_ports(&probe_ent->port[p]);
|
|
probe_ent->pinfo2 = port[1];
|
|
p++;
|
|
}
|
|
|
|
probe_ent->n_ports = p;
|
|
return probe_ent;
|
|
}
|
|
|
|
static struct ata_probe_ent *ata_pci_init_legacy_port(struct pci_dev *pdev,
|
|
struct ata_port_info **port, int port_mask)
|
|
{
|
|
struct ata_probe_ent *probe_ent;
|
|
void __iomem *iomap[5] = { }, *bmdma;
|
|
|
|
if (port_mask & ATA_PORT_PRIMARY) {
|
|
iomap[0] = devm_ioport_map(&pdev->dev, ATA_PRIMARY_CMD, 8);
|
|
iomap[1] = devm_ioport_map(&pdev->dev, ATA_PRIMARY_CTL, 1);
|
|
if (!iomap[0] || !iomap[1])
|
|
return NULL;
|
|
}
|
|
|
|
if (port_mask & ATA_PORT_SECONDARY) {
|
|
iomap[2] = devm_ioport_map(&pdev->dev, ATA_SECONDARY_CMD, 8);
|
|
iomap[3] = devm_ioport_map(&pdev->dev, ATA_SECONDARY_CTL, 1);
|
|
if (!iomap[2] || !iomap[3])
|
|
return NULL;
|
|
}
|
|
|
|
bmdma = pcim_iomap(pdev, 4, 16); /* may fail */
|
|
|
|
/* alloc and init probe_ent */
|
|
probe_ent = ata_probe_ent_alloc(pci_dev_to_dev(pdev), port[0]);
|
|
if (!probe_ent)
|
|
return NULL;
|
|
|
|
probe_ent->n_ports = 2;
|
|
probe_ent->irq_flags = IRQF_SHARED;
|
|
|
|
if (port_mask & ATA_PORT_PRIMARY) {
|
|
probe_ent->irq = ATA_PRIMARY_IRQ(pdev);
|
|
probe_ent->port[0].cmd_addr = iomap[0];
|
|
probe_ent->port[0].altstatus_addr =
|
|
probe_ent->port[0].ctl_addr = iomap[1];
|
|
if (bmdma) {
|
|
probe_ent->port[0].bmdma_addr = bmdma;
|
|
if ((!(port[0]->flags & ATA_FLAG_IGN_SIMPLEX)) &&
|
|
(ioread8(bmdma + 2) & 0x80))
|
|
probe_ent->_host_flags |= ATA_HOST_SIMPLEX;
|
|
}
|
|
ata_std_ports(&probe_ent->port[0]);
|
|
} else
|
|
probe_ent->dummy_port_mask |= ATA_PORT_PRIMARY;
|
|
|
|
if (port_mask & ATA_PORT_SECONDARY) {
|
|
if (probe_ent->irq)
|
|
probe_ent->irq2 = ATA_SECONDARY_IRQ(pdev);
|
|
else
|
|
probe_ent->irq = ATA_SECONDARY_IRQ(pdev);
|
|
probe_ent->port[1].cmd_addr = iomap[2];
|
|
probe_ent->port[1].altstatus_addr =
|
|
probe_ent->port[1].ctl_addr = iomap[3];
|
|
if (bmdma) {
|
|
probe_ent->port[1].bmdma_addr = bmdma + 8;
|
|
if ((!(port[1]->flags & ATA_FLAG_IGN_SIMPLEX)) &&
|
|
(ioread8(bmdma + 10) & 0x80))
|
|
probe_ent->_host_flags |= ATA_HOST_SIMPLEX;
|
|
}
|
|
ata_std_ports(&probe_ent->port[1]);
|
|
|
|
/* FIXME: could be pointing to stack area; must copy */
|
|
probe_ent->pinfo2 = port[1];
|
|
} else
|
|
probe_ent->dummy_port_mask |= ATA_PORT_SECONDARY;
|
|
|
|
return probe_ent;
|
|
}
|
|
|
|
|
|
/**
|
|
* ata_pci_init_one - Initialize/register PCI IDE host controller
|
|
* @pdev: Controller to be initialized
|
|
* @port_info: Information from low-level host driver
|
|
* @n_ports: Number of ports attached to host controller
|
|
*
|
|
* This is a helper function which can be called from a driver's
|
|
* xxx_init_one() probe function if the hardware uses traditional
|
|
* IDE taskfile registers.
|
|
*
|
|
* This function calls pci_enable_device(), reserves its register
|
|
* regions, sets the dma mask, enables bus master mode, and calls
|
|
* ata_device_add()
|
|
*
|
|
* ASSUMPTION:
|
|
* Nobody makes a single channel controller that appears solely as
|
|
* the secondary legacy port on PCI.
|
|
*
|
|
* LOCKING:
|
|
* Inherited from PCI layer (may sleep).
|
|
*
|
|
* RETURNS:
|
|
* Zero on success, negative on errno-based value on error.
|
|
*/
|
|
|
|
int ata_pci_init_one (struct pci_dev *pdev, struct ata_port_info **port_info,
|
|
unsigned int n_ports)
|
|
{
|
|
struct device *dev = &pdev->dev;
|
|
struct ata_probe_ent *probe_ent = NULL;
|
|
struct ata_port_info *port[2];
|
|
u8 mask;
|
|
unsigned int legacy_mode = 0;
|
|
int rc;
|
|
|
|
DPRINTK("ENTER\n");
|
|
|
|
if (!devres_open_group(dev, NULL, GFP_KERNEL))
|
|
return -ENOMEM;
|
|
|
|
BUG_ON(n_ports < 1 || n_ports > 2);
|
|
|
|
port[0] = port_info[0];
|
|
if (n_ports > 1)
|
|
port[1] = port_info[1];
|
|
else
|
|
port[1] = port[0];
|
|
|
|
/* FIXME: Really for ATA it isn't safe because the device may be
|
|
multi-purpose and we want to leave it alone if it was already
|
|
enabled. Secondly for shared use as Arjan says we want refcounting
|
|
|
|
Checking dev->is_enabled is insufficient as this is not set at
|
|
boot for the primary video which is BIOS enabled
|
|
*/
|
|
|
|
rc = pcim_enable_device(pdev);
|
|
if (rc)
|
|
goto err_out;
|
|
|
|
if ((pdev->class >> 8) == PCI_CLASS_STORAGE_IDE) {
|
|
u8 tmp8;
|
|
|
|
/* TODO: What if one channel is in native mode ... */
|
|
pci_read_config_byte(pdev, PCI_CLASS_PROG, &tmp8);
|
|
mask = (1 << 2) | (1 << 0);
|
|
if ((tmp8 & mask) != mask)
|
|
legacy_mode = (1 << 3);
|
|
#if defined(CONFIG_NO_ATA_LEGACY)
|
|
/* Some platforms with PCI limits cannot address compat
|
|
port space. In that case we punt if their firmware has
|
|
left a device in compatibility mode */
|
|
if (legacy_mode) {
|
|
printk(KERN_ERR "ata: Compatibility mode ATA is not supported on this platform, skipping.\n");
|
|
rc = -EOPNOTSUPP;
|
|
goto err_out;
|
|
}
|
|
#endif
|
|
}
|
|
|
|
if (!legacy_mode) {
|
|
rc = pci_request_regions(pdev, DRV_NAME);
|
|
if (rc) {
|
|
pcim_pin_device(pdev);
|
|
goto err_out;
|
|
}
|
|
} else {
|
|
/* Deal with combined mode hack. This side of the logic all
|
|
goes away once the combined mode hack is killed in 2.6.21 */
|
|
if (!devm_request_region(dev, ATA_PRIMARY_CMD, 8, "libata")) {
|
|
struct resource *conflict, res;
|
|
res.start = ATA_PRIMARY_CMD;
|
|
res.end = ATA_PRIMARY_CMD + 8 - 1;
|
|
conflict = ____request_resource(&ioport_resource, &res);
|
|
while (conflict->child)
|
|
conflict = ____request_resource(conflict, &res);
|
|
if (!strcmp(conflict->name, "libata"))
|
|
legacy_mode |= ATA_PORT_PRIMARY;
|
|
else {
|
|
pcim_pin_device(pdev);
|
|
printk(KERN_WARNING "ata: 0x%0X IDE port busy\n" \
|
|
"ata: conflict with %s\n",
|
|
ATA_PRIMARY_CMD,
|
|
conflict->name);
|
|
}
|
|
} else
|
|
legacy_mode |= ATA_PORT_PRIMARY;
|
|
|
|
if (!devm_request_region(dev, ATA_SECONDARY_CMD, 8, "libata")) {
|
|
struct resource *conflict, res;
|
|
res.start = ATA_SECONDARY_CMD;
|
|
res.end = ATA_SECONDARY_CMD + 8 - 1;
|
|
conflict = ____request_resource(&ioport_resource, &res);
|
|
while (conflict->child)
|
|
conflict = ____request_resource(conflict, &res);
|
|
if (!strcmp(conflict->name, "libata"))
|
|
legacy_mode |= ATA_PORT_SECONDARY;
|
|
else {
|
|
pcim_pin_device(pdev);
|
|
printk(KERN_WARNING "ata: 0x%X IDE port busy\n" \
|
|
"ata: conflict with %s\n",
|
|
ATA_SECONDARY_CMD,
|
|
conflict->name);
|
|
}
|
|
} else
|
|
legacy_mode |= ATA_PORT_SECONDARY;
|
|
|
|
if (legacy_mode & ATA_PORT_PRIMARY)
|
|
pci_request_region(pdev, 1, DRV_NAME);
|
|
if (legacy_mode & ATA_PORT_SECONDARY)
|
|
pci_request_region(pdev, 3, DRV_NAME);
|
|
/* If there is a DMA resource, allocate it */
|
|
pci_request_region(pdev, 4, DRV_NAME);
|
|
}
|
|
|
|
/* we have legacy mode, but all ports are unavailable */
|
|
if (legacy_mode == (1 << 3)) {
|
|
rc = -EBUSY;
|
|
goto err_out;
|
|
}
|
|
|
|
/* TODO: If we get no DMA mask we should fall back to PIO */
|
|
rc = pci_set_dma_mask(pdev, ATA_DMA_MASK);
|
|
if (rc)
|
|
goto err_out;
|
|
rc = pci_set_consistent_dma_mask(pdev, ATA_DMA_MASK);
|
|
if (rc)
|
|
goto err_out;
|
|
|
|
if (legacy_mode) {
|
|
probe_ent = ata_pci_init_legacy_port(pdev, port, legacy_mode);
|
|
} else {
|
|
if (n_ports == 2)
|
|
probe_ent = ata_pci_init_native_mode(pdev, port, ATA_PORT_PRIMARY | ATA_PORT_SECONDARY);
|
|
else
|
|
probe_ent = ata_pci_init_native_mode(pdev, port, ATA_PORT_PRIMARY);
|
|
}
|
|
if (!probe_ent) {
|
|
rc = -ENOMEM;
|
|
goto err_out;
|
|
}
|
|
|
|
pci_set_master(pdev);
|
|
|
|
if (!ata_device_add(probe_ent)) {
|
|
rc = -ENODEV;
|
|
goto err_out;
|
|
}
|
|
|
|
devm_kfree(dev, probe_ent);
|
|
devres_remove_group(dev, NULL);
|
|
return 0;
|
|
|
|
err_out:
|
|
devres_release_group(dev, NULL);
|
|
return rc;
|
|
}
|
|
|
|
/**
|
|
* ata_pci_clear_simplex - attempt to kick device out of simplex
|
|
* @pdev: PCI device
|
|
*
|
|
* Some PCI ATA devices report simplex mode but in fact can be told to
|
|
* enter non simplex mode. This implements the neccessary logic to
|
|
* perform the task on such devices. Calling it on other devices will
|
|
* have -undefined- behaviour.
|
|
*/
|
|
|
|
int ata_pci_clear_simplex(struct pci_dev *pdev)
|
|
{
|
|
unsigned long bmdma = pci_resource_start(pdev, 4);
|
|
u8 simplex;
|
|
|
|
if (bmdma == 0)
|
|
return -ENOENT;
|
|
|
|
simplex = inb(bmdma + 0x02);
|
|
outb(simplex & 0x60, bmdma + 0x02);
|
|
simplex = inb(bmdma + 0x02);
|
|
if (simplex & 0x80)
|
|
return -EOPNOTSUPP;
|
|
return 0;
|
|
}
|
|
|
|
unsigned long ata_pci_default_filter(const struct ata_port *ap, struct ata_device *adev, unsigned long xfer_mask)
|
|
{
|
|
/* Filter out DMA modes if the device has been configured by
|
|
the BIOS as PIO only */
|
|
|
|
if (ap->ioaddr.bmdma_addr == 0)
|
|
xfer_mask &= ~(ATA_MASK_MWDMA | ATA_MASK_UDMA);
|
|
return xfer_mask;
|
|
}
|
|
|
|
#endif /* CONFIG_PCI */
|
|
|